Cot 145 Degrees

Sin, Cos, Tan, Cot of an Angle
Function
Angle (°)

What is cot 145°?

Answer

cot 145° ≈
−1.4281

Angle in radians: 145° = 29π/36. The point of the angle is in quadrant II, where cotangent is negative.

≈ — rounded to 4 decimal places. cot 145° can't be written with square roots: 145° is not a multiple of 3°.

cot 145° = cot(180° − 35°) = −cot 35° ≈ −1.4281

cot 145° = cos 145° / sin 145° ≈ −1.4281

xyOP

P(cos 145°, sin 145°) ≈ (−0.8192, 0.5736)

C(cot 145°, 1) ≈ (−1.4281, 1) — where line OP meets the line y = 1.

All four functions of 145°
FunctionExact valueDecimal
sin 145°—≈ 0.5736
cos 145°—≈ −0.8192
tan 145°—≈ −0.7002
cot 145°—≈ −1.4281

Reference angle: cot 35° ≈ 1.4281

See Also

Recalculate with different values ↑

Cotangent of nearby angles

Anglecot
140°≈ −1.1918
142°≈ −1.2799
144°−√(25 + 10√5)/5
145°≈ −1.4281
150°−√3
159°≈ −2.6051
160°≈ −2.7475

FAQ

What is cot 145°?

cot 145° ≈ −1.4281

Why does cot 145° have no exact value?

A trigonometric value of a whole number of degrees can be written with square roots only when the angle is a multiple of 3°. 145° is not, so no such exact form exists; the value is used as a decimal: cot 145° ≈ −1.4281.

Why does a calculator show 1.8896 for cot 145?

The calculator is in radian mode (RAD): it takes cot 145 as the cotangent of 145 radians, cot 145 rad ≈ 1.8896. Switch it to degrees (DEG): cot 145° ≈ −1.4281. In radians the value is never undefined: π is irrational, so a whole number of radians never lands exactly on an axis.

See Also